Nioboheftetjernite : ScNbO4
Ferberite : FeWO4
40μm x 20μm
Photo added to mindat.org
“Grain of zonal crystal of ferberite core (white) and Sc-Nb oxide rim (dark gray). Crystal chemical formula of Sc-Nb phase with the highest conten of Sc in composition: (Sc0.53Fe2+0.15Ti0.08Fe3+0.08Sn0.06Mn0.05Zr0.03)Σ0.92(Nb0.86W0.07Ti0.04Ta0.03)Σ1.06O4”
Eligiusz Szełęg - 13th February 2019
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